There may be plenty of uranium. However there isn't plenty available for easy extraction.
"Is nuclear energy green" Sabine Hossenfelder
"Is nuclear energy green" Sabine Hossenfelder
See the late Prof. MacKay’s work on the subject, considering fast breeder reactors to reuse the fuel and ocean extraction of uranium: https://www.withouthotair.com/c24/page_164.shtml
Also, this seems like an extreme luddite attitude. Imagine refusing to use a steam engine because nobody has demonstrated infinite coal reserves exist.